Buffer



April 1o,I 192s. I 1',665,292 H. s. ANDERSON ET Ar.

BUFFER Filed Nov. 27. 1925 Patented pr. 10, 1928i. y

UNITED s'rfras PATENT OFFICE.

HAZEN S. NDERSON, OF ROCHESTER, AND JESSE BJBBOWN, 0F FLINT, MICHIGAN, AS

v SIGNORS TO GENERAL MOTORS CORPORATION, 0F DETROIT, MICHIGAN, COBrrona'rron orfnnnnwann.

BUFFER.

4Application led November 27, 1925. Serial No. 71,712.

This invention relates to buffers.

It is particularly concerned with an imroved buffer for rubbing down automobile od surfaces, and has been found especially use ul 'when applied to surfaces beingA given the well knownDuco finish.

improvements -in ,The usualI buffer consists of a pad of felty 'l or the like in rigid relation with and` rotated4v by a holder constituting a driving member. In the use of such a -buifer the contour -of the surface to be rubbed down is frequently such that it requires much diiicult manual labor to properly 4apply the buffer disc. It is the principal object of this invention to so construct the buffer that the irregular surfaces. and the corners dilicult r 'of access may receive the necessary rubbing withless manual manipulation of the buffer than heretofore.` To that end there is applied a resilient 'element between the'holder or driving member and the ad. This resilient element enables the fe t pad to conform to the surface being rubbed down.

A further object is to secure flexibility by a construction which shall yield-circumferentially, as well as-axially, and which may possess in a marked degree such advantages f as durability and freedom from breakage.

With this and/ other objects, this invention 'is carried into effect by the use of certain structural parts and structural arrangements, as hereinafter described, and asvmore ointed out in the claims.

thedrawing in Iwhich Figure 1 is a plan view of the A,buii'er looking toward the rear face of the disc, with parts cut away toshow the .spring elements.

Figure 2 is a sectional view on line 2-2 of Figure 1. V

Figure 3 is a view'similar to Figure 1 0f a modified form. l lFigure 4 is a section on line 4-4 of Fig-- 'ure Like characters'of reference refer to the samevnumbers in the several figures.

Referring to Figures 1 and 2 of the draw-Q ings, numeral 4 is a thick felt pad and 6 is a holder constituting I the driving member.

This driving member is, it will be u nderstood, itself driven by any well-known means, as by a flexible shaft from ,a motor. The means for.- member 6 forms no part of the invention and is not beinv given further description. It lwill be o'served that the holder 6 is formed with flange 8 and to this flange are riveted radially o 'sitioned fiat leaf spring memberslO. Att eir inner ends these spring members are tapered so that they interfiton the faceof the ange adjacent tothe felt pad as clearly' shown 7 on the drawing. Ehe spring members are bowed away from the driving member and at their extremities are received within a pocket or retainer 12, made from a double. thickness of leather, one layer lying against the pad and the other overlying the bowed outer ends of ,the springs. Theback 'of the t retainer is secured to the felt pad by a double seam, as at 14. .The outer ends of the spring members are` bent over as at 16 f within the ing. l

Between the Hang? on-'the holder andthe central 'portion of t e padfthere is lacedl coil spring 18, convenlently secure to the driving member b soldering.

It will bereadi -y a preciated that-'when the'felt pad is rotate and applied to the surface to be rubbed, the springs may yield pocket, as will be seen from drawsurface Awhich it engages. Parts of the surface diiicult to be rubbed'down when manual labor was necessary to adjust the, posi- -to enable the pad to readily conform to the' sa tion of the ad, are readil reached-by the bendin of t e spr-ing' mem ers without fur! there ort on the part of the o erator.

Referring now to themodiie form shown in Figure 3 and Figure 4 the'holder 6 is provided with an annular fiange 8 and throught-his flange are bored a pluralit of radial apertures.-. Passing through t ese apertures arecoil springs 2 0 the wire coils of the several springs being bent over as at 22 and through these bent overlcoilsis passed a wire 24 the ends of which are then twisted together to secure the coil springs in the holder. The outer ends of the coll springs are carried in the retainer sewed to the felt pad as before. l

. This specific type 0f spring is particularly desirable from 'the 'oint of View of durability and freedom rom breakage.I It will -be 'observed that not only may the disc bend under the yieldin action ofthe Springs as cu'mferential flexure '1s-secured `by ,thel use of these coil springs which believed to be claims. Y What we claim and 'desire to protect by Letters Patent is: l

1. In a Abuffer of theclass described, holder, a, builin pad and a pluralityiqf coiled springs ra ially arranged secured at their inner ends to the holder and carried at their outer ends by the outer portion on the pad.

2. In a bufer of the class described, a holder having a lurality ofradial apertures, a buiiing p and a' pluralityof coiled springs radially arranged, passing through the'apcrtures, and secured to the. holder, the ,ends vof the coiled springs being engaged with the outer periphery of the ad. Y 25 3. In a butler of vthe class details enumerated within the limits of the.

vthese inner coils vto secure the springs to the escribed, a l,

holder having a plurality of radial aper-4 tures, a buingv pad, a pluralit ofcoiled springs engaged with the perip ery of the pad at thelr outer ends, the inner ends of. e the s rings passing through the apertures of 30 the older, the inner loopsof the coiled springs beingbent over and a Wire passed through said bent-over loops to secure the spring to the holder.v

4; In "a buier of .the class described, aholder having a plurality of radial apertures, a buing pad, a. plurality of `coiled springs, an annulus constituting 'a pocket attached to the outer periphery of the pad', t the outer ends of the coiled springs received within theV annulus, the inner ends of the springsV passing through the apertures -in the holder, the inner coils' of the springs being bent over and a wire passing through '45 holder. In testimony whereof we ailix'our signa'- Y HAZEN S.' ANDERSON.

JESSE B. BROWN. 

